Spark control for internal combustion engines



Nov. 10, 1931. R. A. CHAMBERLIN 1,831,378

SPARK CONTROL FOR INTERNAL COMBUSTION ENGINES Original Filed May 27, 1929 portion of the normal control invention consists in the parts of my device,

Patented Nov. 10, 1931 RALPH A. crrAMBE'nLrn, or ronnaJowA SPARK CONTROL FOR INTERNAL COMBUSTION ENGINES Application filed May 27, 1929, Serial My invention relates to spark control in internal combustion engines, and has for 1ts object to provide a semi-automatic control, adapted to eflect retardation of the spark when the engine is being started.

The effectiveness of the device of my invention depends upon the fact that it is almost always necessary to choke the carburotor of an internal combustion engine during starting. Most motorists, even in the hottest da s of summer, use the choke, from force of habit if from no other cause. takes advantage of this fact by connecting the carburetor with the control rod or some of the timer or distributor in such a manner that during the choking process, the spark control will be actuated to retard the spark.

A further object of my invention is to provide a device that may be adapted to any internal combustion engine, for transferring the movement of the choke lever to the spark control.

A further object is to provide a device of this kind that is simple, durable, and inexpensive in construction.

With these and other objects in View, my

construction, arrangement, and combination of the various whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my cla1m, and illustrated in the accompanymg drawings, in which:

Fig. 1 is a plan view of an engine to which my invention is attached,

Fig. 2 is a plan View in detail of the transfer device.

Fig.3 is a similar view with the of the device removed, and V Fig. 4 is a detail sectional View through the device.

I have used the reference character 10 to indicate generally the body of an internal combustion engine having the carburetor 11, the choke lever with the two arms 12 and 13, the spark control rod 14, and the timer 15.

The transfer device comprises a base plate 16, provided with a pair of openings through which are extended bolts 17, a top plate 18,

top plate My invention posite to that of the arrow 31 in No.i36 493. 3enewe1i April 6, 1931.

through which the bolts 17 also pass, and a pair of sleeves 19, through which thebolts pass, and which serve to space the top plate '18 fro'mgth'e base plate 16. 3 I, Nuts'2O are threaded onto the bolts 17 and 6 hold the topplatelS securely in place.- Freely rotatable *onthe sleeves 119 area pair of pinions 21,me'shing with each other.

he pinions 21 are provided'with polygonal shoulders 22, upon which are loosely fitted '6 the sockets 23 of levers 24 and 25. I V rod26 isprovided, to connect the lever 25' with the arm 12 of the choke"lever,and'a irod 27'is provided, to connect the lever 24 with'the spark'control rod 14, Thegr d 27, is P v de with a p a which encircles'the rod 14, and is 'slidable thereon; J Engagement of; the loop 28, with the rod 14' is effected by means of a collar 29, secured-to the rod-14. ,j

-1 M the arrangement shown, when-the operator pulls upwardly on the choke rod 30, the arm.v 12. will move rearwar'dly, as indicated by the arrow '31.

This will cause the arm 25 of the transfer device to move as indicated by the arrow 32 in Fig. 3, and the lever 24 of the transfer device will be swung, due to the meshing of the pinions 21, in the direction indicated by the arrow 33, moving the rod 27 in the direction "'80 indicated by the arrow 34 in Fig. 1, and pushing the spark rod 14 in the same direction.

When the spark control is actuated in the usual way by the hand lever on the steering wheel of the vehicle, the rod 14 will slide' through the loop 28, as will be evident from the drawings.

It will be understood that many different arrangements will be encountered in the rel ative positions of spark control rods and choke levers, and for this reason, it is desirable that the transfer device be adaptable to adjustment. For instance, if the choke lever were such that the rod 26 could only cg be connected for movement in a direction op- Fig. 1, while the rod 14 were adapted to movement in the same direction as hereinbefore described, then the proper movement could be transferred l ou 16. A pair of securing elements are'em ployed for this purpose, such as the bolts 37 In the particular installation shown, the

bracket is attached'to' aconvenient bolt on 1 the engine, and a brace 40 extends from one of the bolts'87 to one of themanifold clamp bolts 41 of the particular engine shown.

some changes may be made in the construction and arrangement of the various parts of my-invention without departing from the I true spirit of the invention, and it is my intention'to cover by my claim, any modified 7 form orthe u'se of mechanical equivalents of the invention that may be reasonably includedwithin their scope.

I claim as my invention:

A device of the class described, comprising a pair of plates, bolts extended through said plates and holding them together, sleeves surrounding said bolts and engaging the inner faces of the plates to hold them apart, a pair of pinionsjournaled on saidsleeves and meshing with each other, said pinions having polygonal shoulders, and a pair oflevers provided with sockets received upon said shoulders, said levers being held in place by one ot the plates.

Signed this 24th day of Ma; 1929, in the city 0f Fonda and State of Iowa. v

RALPH A. CHAMBEBLIN. 

